so as to how the instructions are selected. compiling for code size does not have an effect ? Xin On Sun, Nov 11, 2012 at 2:54 PM, Andrew Haley <aph@xxxxxxxxxx> wrote: > On 11/11/2012 07:47 PM, Xin Tong wrote: >> when gcc is set to compile for minimal code size, what kind of >> optimizations does gcc apply in comparison to compile for performance >> ? or it is just gcc spends more time doing the compilation, selecting >> instruction sequences that are optimal for code size. > > No. GCC does all optimizations *except* those known to increase > program size. This usually works pretty well, but isn't perfect. > > Andrew. >
